Power Temp Systems, Inc. NEMA L21-20 Feeder Cables are designed and engineered to deliver maximum performance in the harshest environments. These assemblies are manufactured using #10/5, Multi-Conductor, cable. Industry-standard Twist-Lock devices offer a safe, secure, watertight connection, providing for long operational life. In addition to our cable assemblies, we offer a complete line of power distribution accessories that are designed to facilitate safety and ease of installation of a complete power distribution network. These products allow you to custom tailor the installation to suit your specific needs.  The NEMA L21-20 feeder cables can be used as an extension cable from a 20 Amp 208V 3Ø power source with a NEMA L21-20R receptacle. Each cable is equipped with a built-in strap for coiling and storage.